To keep your lights on and all your essential systems powered regardless of storms, grid failures, or other unavoidable disruptions, it’s worth investing in a backup home generator. It’s not just an investment in convenience, but also a safeguard for your home, comfort, and health. Here’s everything you need to know about generators.
Home Generators
A home generator is an appliance that can generate electricity by burning diesel, natural gas, gasoline, oil, or propane. These units are self-contained and self-powered and operate independently of the utility grid. When the power goes out, a properly installed generator can automatically detect the outage and begin supplying electricity within seconds.
How Generators Work
To understand how generators work, you need to know the main components at play. They include:
The Fuel System
Diesel, gasoline, propane, and oil generators have a fuel tank. A supply fuel pipe transfers fuel from this tank to the engine, while a return fuel pipe channels unused fuel back to the tank.
The fuel system also includes a filter to remove solid particles before the fuel enters the engine: a fuel pump to move fuel through the pipes, and injectors to deliver a precise amount of fuel into the combustion chamber. The injection must be precise to ensure efficient combustion, which is critical for consistent power output and engine longevity.
Note, however, that natural gas-powered generators do not have a fuel tank. Instead, they connect directly to the natural gas line that supplies your home. Many homeowners find this setup convenient, as it eliminates the need for manual refueling and allows for continuous operation if the gas line is operational.
The Engine
The engine is the heart of the generator. This is where combustion occurs. It comprises an ignition coil, spark plugs, pistons, and a crankshaft. The ignition coil generates the high voltage needed to create a spark at the plugs, igniting the fuel-air mixture inside the combustion chamber.
Fuel enters the chamber via precise injection from the fuel injectors, while air is drawn in through the intake system and regulated by the throttle body. Once inside the combustion chamber, the fuel-air mixture is compressed by the pistons and ignited by the spark plugs, producing an explosion. This explosion drives the pistons downward, turning the crankshaft and producing mechanical energy.
The Alternator
The alternator converts the mechanical energy produced by the engine into electricity. It does this via a process called electrical induction. Inside the alternator, a rotor spins within a stationary set of windings (basically an organized bunch of wires wrapped around a core) called the stator. As the rotor turns, driven by the engine’s crankshaft, it creates a magnetic field that induces an electrical current in the stator windings.
The electricity produced is called alternating current (AC). This is a type of current that reverses direction periodically, depending on the rotor’s rotational speed and the alternator. The frequency of this reversal is typically 60 Hz in North America.
Cooling System
While producing electricity, generators produce a lot of heat. They have several moving parts that experience friction, and the combustion chamber itself reaches very high temperatures during operation. Without proper cooling, this heat can degrade components, reduce efficiency, and lead to premature failure.
To manage this thermal load, generators either use air or liquid cooling systems. Air-cooled units rely on fans to circulate ambient air across the engine block and other heat-prone areas. Meanwhile, liquid-cooled generators use a closed-loop system where a coolant (water or antifreeze) absorbs heat from the engine and other heat-prone areas and passes through a radiator, which is cooled by airflow.
Air cooling is common in portable and smaller standby home generators due to its simplicity and lower maintenance requirements. Liquid-cooled units are more effective for larger whole-home generators or those running for extended periods.
Exhaust System
The combustion process produces harmful and toxic gases. These gases must be safely expelled to prevent health hazards and environmental pollution. Thus, generators are equipped with an exhaust system that includes exhaust piping to direct gases away from the unit and into a well-ventilated, safe discharge area; a muffler to reduce operational noise; and heat shielding to protect nearby components and surfaces from high temperatures.
Lubrication System
Generators are equipped with a pressurized lubrication system to reduce the friction between moving parts and prevent premature wear. Lubrication also helps to dissipate heat between metal contacts and removes microscopic debris generated during operation.
Automatic Transfer Switch (ATS)
ATS is a component in generators that monitors the utility power supply. When it detects an outage, it automatically initiates the generator, disconnects the home from the grid, and connects your electrical system to the generator’s output.
When utility power is restored, the ATS reverses the process. It reconnects the home to the grid and automatically shuts down the generator.
Starter Mechanism and Battery
There are two ways to start a generator: a starter motor and a pull cord mechanism. The starter motor uses a battery to deliver the initial burst of electrical energy needed to crank the engine. This method is standard in most home generators.
When the generator detects a power outage via the automatic transfer switch, the battery engages the starter motor, which then awakens the engine. The battery also powers the control panel and other monitoring systems.
A pull cord mechanism is found in smaller, manual-start generators. You must pull the starter cord to engage the engine.
Types of Home Backup Generators You Can Install
You’ll encounter two basic types of home backup generators while shopping. They include:
Whole-House Generators
Whole-house generators are also referred to as standby or stationary generators. They are permanently installed outside the home, typically on a concrete pad. They are hardwired into the electrical system and paired with an automatic transfer switch, allowing for seamless and continuous power supply throughout the year.
The primary advantage of installing a whole-house generator is for peace of mind. They are sized to power the entire house, and some models, like gas generators, can run indefinitely as long as the fuel supply remains uninterrupted. They are remarkably quiet, and you don’t even need to fuss over severe weather, as they are built to endure harsh conditions.
The drawback, however, is the cost. Whole-house generators require professional installation, permitting, and integration with your home’s electrical and fuel systems, all of which can add up. Fortunately, many companies, including Liberty Comfort Systems, offer flexible financing plans to buffer the upfront investment and make standby power more accessible to homeowners.
Portable Generators
Portable generators are smaller, mobile units used to power essential circuits inside the home, such as refrigerators, lights, health devices, and home office computers. They mostly run on liquid fuels like gasoline and propane, but you can find models that can connect to your natural gas line.
Contact Liberty Comfort Systems for More Information
If you are searching for a reliable and efficient home generator in Anoka, consult Liberty Comfort Systems for expert guidance. Our electricians are experienced, trained, and certified to install and service both whole-house and portable generators. We’ll help you assess your power needs, choose the right unit, and ensure proper installation that meets local codes and safety standards.
Call Liberty Comfort Systems today for home generator installation in Anoka.
